Inbound http message validation with JSR303

Question

I'm using Spring Integration to receive an http message and then put it in a channel and do some transformations.

I read the documentation (https://docs.spring.io/spring-integration/reference/html/http.html) and it will look like:

@Bean
public HttpRequestHandlingMessagingGateway inbound() {
    HttpRequestHandlingMessagingGateway gateway =
        new HttpRequestHandlingMessagingGateway(true);
    gateway.setRequestMapping(mapping());
    gateway.setRequestPayloadType(SomeBean.class);
    gateway.setRequestChannelName("httpRequest");
    return gateway;
}

I want to validate the payload using JSR 303 bean validation (https://beanvalidation.org/1.0/spec/), is it possible? What is the best way?

Thanks in advance!

Answer 1

There is a dedicated paragraph about validation: https://docs.spring.io/spring-integration/reference/html/http.html#http-validation. So, you just need to use a setValidator() of that gateway:

/**

 * Specify a {@link Validator} to validate a converted payload from request.

 * @param validator the {@link Validator} to use.

 * @since 5.2

 */

public void setValidator(Validator validator) {

    this.validator = validator;

}

The validation API comes from Spring Framework: https://docs.spring.io/spring/docs/5.2.4.RELEASE/spring-framework-reference/core.html#validation